In which of the following situations does a resting membrane potential exist?
A. a relaxed muscle fiber
B. a conducting neuron
C. a stimulated sensory receptor in the skin
D. a contracting cardiac muscle cell
E. the eye seeing an image
A
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During aerobic exercise in vertebrates
A) Sympathetic stimulation of heart decreases. B) Blood pressure changes only slightly. C) Higher brain centers are not involved. D) The activity of the parasympathetic nervous system increases.
Some fish can be caught with a net by bringing it up from beneath them
Indicate whether the statement is true or false
Membrane transport may be passive or active. Select the active process from the list below
A) filtration B) phagocytosis C) osmosis D) simple diffusion
What pregnancy disorder is characterized by premature detachment of the placenta from the uterine wall?
A. Placenta previa B. Placental abruption C. Preeclampsia D. Ectopic pregnancy